Treatment Tool Grasper Trajectory Adjustment Mechanism
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Solution Overview
Problem
Existing medical treatment tools with ultrasonic vibration capabilities face challenges in accurately adjusting the relative position between graspers to effectively grasp and treat target regions in living tissues, leading to inconsistent treatment outcomes.
Innovation Solution
A treatment tool with a first grasper and a second rotatable grasper, featuring an adjustment mechanism with a protrusion that allows for precise adjustment of the trajectory and relative position between the graspers, enabling accurate alignment and positioning for optimal treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the second grasper is rotatably provided with respect to the first grasper to enable flexible grasping, then the adaptability of the treatment tool is improved, but the manufacturing precision and relative position alignment between the graspers deteriorate
Solution Approach 1:
The second grasper is configured to be rotatable with respect to the first grasper via a shaft, enabling dynamic adjustment of the grasping angle and trajectory. This rotational freedom allows the treatment tool to adapt to different tissue depths and angles while maintaining precise relative positioning through the adjustment mechanism.
Solution Approach 2:
The treatment tool is divided into separate modular components including the first grasper, second grasper, shaft, and adjustment mechanism. This segmentation allows independent adjustment of each component's position and orientation, enabling both flexibility in grasping configurations and precision in relative positioning through the protrusion-based adjustment mechanism.
2Ease of manufacture
If components are manufactured with standard tolerances to reduce manufacturing cost, then the ease of manufacture is improved, but the manufacturing precision of component lengths deteriorates, causing trajectory deviations
Solution Approach 1:
The adjustment mechanism including the protrusion is pre-configured during assembly to compensate for cumulative length variations in components. By establishing the trajectory and relative positions through this preliminary adjustment step, the system accounts for standard manufacturing tolerances without requiring ultra-precise component fabrication.
Solution Approach 2:
The adjustment mechanism allows modification of the trajectory parameters and relative positions after assembly. By changing these geometric parameters through the protrusion adjustment, the system compensates for length variations in components manufactured with standard tolerances, achieving the required precision without tighter manufacturing controls.
3Device complexity
If the graspers are fixed in position to simplify the structure, then the device complexity is reduced, but the adaptability for different treatment trajectories deteriorates
Solution Approach 1:
The second grasper is designed with rotational capability with respect to the first grasper, transforming the structure from fully fixed to partially dynamic. This controlled mobility enables adjustment of treatment trajectories and grasping angles while maintaining relative structural simplicity through the straightforward shaft-based rotation mechanism.
Solution Approach 2:
The treatment tool is segmented into adjustable modules (first grasper, second grasper, shaft, adjustment mechanism) connected through defined interfaces. This modular segmentation provides adaptability for different trajectories while keeping each module's structure simple and the overall assembly straightforward.
4Manufacturing precision
If the adjustment mechanism is made complex to achieve high precision, then the manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The protrusion-based adjustment mechanism performs the precision function of trajectory and position setting in a single preliminary adjustment step during assembly. This preliminary action achieves high trajectory accuracy without requiring complex multi-stage adjustment mechanisms, keeping the overall device structure relatively simple.
Solution Approach 2:
The protrusion acts as an intermediary element between the adjustment mechanism and the graspers, translating simple mechanical adjustments into precise trajectory and position control. This intermediary component enables high manufacturing precision through a relatively simple adjustment mechanism by mediating the relationship between the adjustment input and the grasper positioning output.
Data Source
AI summary
A treatment tool includes: a first grasper; a second grasper that is rotatably provided with respect to the first grasper, the second grasper being configured to grasp a target region together with the first grasper by approaching the first grasper; a shaft configured to rotate the second grasper with respect to the first grasper; and an adjustment mechanism configured to adjust a trajectory along which the second grasper passes when the second grasper rotates about the shaft and approaches the first grasper, the adjustment mechanism including a protrusion provided according to a predicted length to be required due to variations in components.